Long-Range Superharmonic Josephson Current

被引：41
|
作者：
Trifunovic, Luka [1 ]
机构：
[1] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 04期
关键词：
QUANTUM SUPERPOSITION; FERROMAGNET; JUNCTION; SUPERCONDUCTIVITY; STATES;
D O I：
10.1103/PhysRevLett.107.047001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider a long superconductor-ferromagnet-superconductor junction with one spin-active region. It is shown that an odd number of Cooper pairs cannot have a long-range propagation when there is only one spin-active region. When the temperature is much lower than the Thouless energy, the coherent transport of two Cooper pairs becomes the dominant process and the superharmonic current-phase relation is obtained (I proportional to sin2 phi).
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页数：4
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